Special Weather Statement, NWS Salt Lake City, UT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
959 AM MDT MON JUL 16 2012

.SYNOPSIS...A DRYING TREND WILL BEGIN TODAY AND CONTINUE THROUGH
MID WEEK WITH DRIER CONDITIONS REMAINING IN PLACE INTO THURSDAY.
MOISTURE IS EXPECTED TO RETURN TO THE AREA LATE IN THE WEEK.

&&

.DISCUSSION...A FEW ISOLATED THUNDERSTORMS HAVE CONTINUE TO MOVE
ALONG THE UTAH/NEVADA BORDER THIS MORNING. THESE THUNDERSTORMS ARE
LIKELY ASSOCIATED WITH A SUBTLE SHORTWAVE FEATURING ROTATING
NORTHWARD.

CLEARING SKIES ARE PRESENT ACROSS MUCH OF THE CWA THIS MORNING.
BLENDED TPW IMAGERY INDICATES PW VALUES REMAIN BETWEEN 0.80 AND 1
INCH ACROSS THE MAJORITY OF THE CWA. WITH CLEARING SKIES ACROSS
MUCH OF THE AREA...EXPECT INSTABILITY TO INCREASE THIS MORNING
INTO EARLY THIS AFTERNOON.

SREF ENSEMBLE FORECASTS INDICATE THERE IS SUFFICIENT SHEAR ACROSS
THE AREA TO SUPPORT CONVECTION...WITH A FEW CELLS CAPABLE OF
ACHIEVING SOME ORGANIZATION. WITH SUFFICIENT MOISTURE...AT LEAST
MARGINAL INSTABILITY...AND SHEAR...EXPECT CONVECTION TO DEVELOP
LATER THIS MORNING INTO EARLY THIS AFTERNOON. ISOLATED FLASH
FLOODING REMAINS A THREAT...PARTICULARLY WITH ANY THUNDERSTORMS
THAT DEVELOP ACROSS SOUTHWESTERN UTAH. ALSO CANT RULE OUT A FEW
CELLS BEING CAPABLE OF PRODUCING SMALL HAIL.

DRIER AIR IS EXPECTED TO MOVE INTO THE AREA TONIGHT IN TUESDAY
BRINGING AN END TO THIS MONSOONAL SURGE. THE NEXT CHANCE FOR
ANOTHER MOISTURE SURGE APPEARS TO BE FRIDAY INTO SATURDAY.

&&

.AVIATION...GUSTY SOUTH WINDS CONTINUE AT THE SLC TERMINAL THIS
MORNING. EXPECT CONVECTION TO DEVELOP ACROSS NORTHERN UTAH LATER
THIS MORNING INTO EARLY THIS AFTERNOON. THERE IS A 20 PERCENT
CHANCE A THUNDERSTORM OR THE ASSOCIATED OUTFLOW WILL IMPACT THE
TERMINAL BETWEEN 21-00Z.

CANT RULE OUT A WIND SHIFT TO THE NORTHWEST BETWEEN 19-21Z THIS
AFTERNOON. WILL CONTINUE TO MONITOR TRENDS AND UPDATE THE TAF IF
NEEDED.

&&

.FIRE WEATHER...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
AGAIN THIS AFTERNOON. STORMS WILL INITIALLY FORM OVER THE HIGHER
TERRAIN...AND DRIFT OVER ADJACENT VALLEYS. WINDS WILL BE GUSTY AND
ERRATIC IN THE VICINITY OF ANY STORMS THAT FORM.
ADDITIONALLY...HEAVY RAIN AND LIGHTNING WILL ACCOMPANY STORMS.

SOUTHWEST FLOW ALOFT WILL CONTINUE TO INCREASE OVER THE NEXT 24
HOURS ALLOWING DRIER AIR TO NOSE IN FROM THE SOUTHWEST. THIS HAS
ALREADY BEGUN AT THE UPPER LEVELS AND WILL GRADUALLY TRANSITION
DOWN TO THE SURFACE ALLOWING LOWERING RELATIVE HUMIDITY AND
WARMER TEMPERATURES BEGINNING TUESDAY. DRY AND BREEZY CONDITIONS
CAN BE EXPECTED ACROSS THE WESTERN VALLEYS MIDWEEK. DRY AND WARM
CONDITIONS WILL CONTINUE THROUGH THE LATTER HALF OF THE WEEK WITH
ANY STORM DEVELOPMENT REMAINING ISOLATED AND PEGGED TO THE
TERRAIN ACROSS THE EASTERN HALF OF THE AREA.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

KRUSE/HOSENFELD

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
552 AM MDT MON JUL 16 2012

UTZ001>016-019>021-517-518-WYZ021-171200-
CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT-
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS-
SOUTHERN MOUNTAINS-SOUTHWEST WYOMING-
552 AM MDT MON JUL 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF
UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL BE SCATTERED ACROSS THE OUTLOOK
AREA TODAY THROUGH EARLY THIS EVENING...WITH A CONTINUED POTENTIAL
FOR ISOLATED HEAVY RAINFALL. SOME OF THESE STORMS COULD ALSO
GENERATE STRONG GUSTY WINDS AND HAIL. STORMS WILL DIE OFF DURING
THE EVENING AND END TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

DRIER AIR WILL GRADUALLY WORK INTO THE OUTLOOK AREA FROM THE WEST
TUESDAY WITH SUBSTANTIALLY LESS SHOWER AND THUNDERSTORM ACTIVITY
EXPECTED. THE DRIER AIR WILL BECOME ESTABLISHED ACROSS THE REGION
BY WEDNESDAY AND PERSIST INTO THURSDAY. PATCHY MOISTURE COULD
BEGIN TO RETURN FRIDAY...WITH THE THREAT OF SHOWERS AND
THUNDERSTORMS INCREASING ONCE AGAIN.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR INFORMATION ON POTENTIAL TRAVEL IMPACTS VISIT...
HTTP://WWW.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
124 PM MDT MON JUL 16 2012

UTZ005-162030-
GREAT SALT LAKE DESERT AND MOUNTAINS UT-
124 PM MDT MON JUL 16 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN TOOELE COUNTY UNTIL
230 PM MDT...

AT 122 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES SOUTHEAST OF WENDOVER...MOVING NORTHEAST
AT 20 MPH.

PENNY TO NICKEL SIZE HAIL AND WIND GUSTS OF 40 TO 55 MPH ARE EXPECTED
WITH THIS STORM...ALONG WITH HEAVY RAIN. PONDING OF WATER ON AREA
ROADWAYS IS POSSIBLE INCLUDING INTERSTATE 80 FROM JUST EAST OF
WENDOVER TO WEST OF DELL.

* LOCATIONS IMPACTED INCLUDE...
  WESTERN TOOELE COUNTY INCLUDING INTERSTATE 80 FROM NEAR WENDOVER
TO WEST OF DELL...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4099 11359 4071 11323 4046 11389 4062 11406
TIME...MOT...LOC 1923Z 229DEG 17KT 4062 11389

CRK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
201 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0140 PM     NON-TSTM WND GST 21 SE WENDOVER          40.52N 113.75W
07/16/2012  M58 MPH          TOOELE             UT   MESONET

            NORTH SALT FLATS SENSOR

&&

CRK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
220 PM MDT MON JUL 16 2012

UTZ005-162130-
GREAT SALT LAKE DESERT AND MOUNTAINS UT-
220 PM MDT MON JUL 16 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BOX ELDER AND
NORTHWESTERN TOOELE COUNTIES UNTIL 330 PM MDT...

AT 219 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR WEST WENDOVER...MOVING EAST AT 20 MPH.
ADDITIONAL THUNDERSTORMS ARE LOCATED NORTH OF THIS LINE AND WILL
MOVE EAST INTO THE BONNEVILLE SALT FLATS.

WIND GUSTS OF 40 TO 55 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
   WENDOVER...
   BONNEVILLE SALT FLATS...
   INTERSTATE 80 FROM WENDOVER TO WEST OF CLIVE

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4050 11406 4126 11406 4142 11344 4037 11339
      4045 11407
TIME...MOT...LOC 2020Z 257DEG 17KT 4071 11416

CRK